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TP53 mutations are found in 30% of breast tumors and are associated with poor prognosis in distinct subtypes of breast cancer. Direct sequencing is commonly used to obtain TP53 mutation status in tumor tissue, but has limitations in detection level and is time-consuming. Methods targeting hotspots is insufficient for TP53 analysis since the mutations are widely spread along the gene1. Here we describe the development of the Ion TorrentTM next-generation semiconductor sequencing and Ion AmpliSeqTM technology (Life TechnologiesTM).